LocalTaskService transaction handling within CMT transaction, whenever TaskService generates an error, the original exception is swallowed

Issue

• If any api in LocalTaskService (say claimTask, completeTask or delegateTask) fails, we see the following exception

00:11:46,610 ERROR [org.jboss.as.ejb3.invocation] (http-/0.0.0.0:8080-2) JBAS014134: EJB Invocation failed on component xxxTaskService for method public abstract void com.xxx.yyy.business.task.interfaces.ITaskService.claimTask(java.lang.Long,java.lang.String,java.lang.String,java.util.List) throws java.lang.Exception: java.lang.IllegalStateException: JBAS014160: Wrong tx on thread: expected TransactionImple < ac, BasicAction: 0:ffff1196283d:100001a6:532a54b5:12bbf3 status: ActionStatus.ABORTED >, actual null
        at org.jboss.as.ejb3.tx.CMTTxInterceptor.endTransaction(CMTTxInterceptor.java:81) [jboss-as-ejb3-7.1.2.Final-redhat-1.jar:7.1.2.Final-redhat-1]
        at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:231) [jboss-as-ejb3-7.1.2.Final-redhat-1.jar:7.1.2.Final-redhat-1]
        at org.jboss.as.ejb3.tx.CMTTxInterceptor.required(CMTTxInterceptor.java:303) [jboss-as-ejb3-7.1.2.Final-redhat-1.jar:7.1.2.Final-redhat-1]
        at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:189) [jboss-as-ejb3-7.1.2.Final-redhat-1.jar:7.1.2.Final-redhat-1]
        at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final-redhat-1.jar:1.1.1.Final-redhat-1]
        at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41) [jboss-as-ejb3-7.1.2.Final-redhat-1.jar:7.1.2.Final-redhat-1]
        at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final-redhat-1.jar:1.1.1.Final-redhat-1]
        at org.jboss.as.ejb3.component.interceptors.ShutDownInterceptorFactory$1.processInvocation(ShutDownInterceptorFactory.java:42) [jboss-as-ejb3-7.1.2.Final-redhat-1.jar:7.1.2.Final-redhat-1]